feat: add AI Dental Shopping section with sidebar nav and Login Info page

- Add AI Dental Shopping to sidebar with Search/Tag and Login Info sub-pages
- Build full-stack Login Info CRUD: save vendor name, website, username, password per user
- Add ShoppingVendor Prisma model, run db push, regenerate client and Zod schemas
- Add storage layer, REST API at /api/shopping-vendors/, and frontend table with add/edit/delete modal

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

packages/db/generated/prisma/index-browser.js

@@ -271,6 +271,15 @@ exports.Prisma.InsuranceCredentialScalarFieldEnum = {
   password: 'password'
 };
 
+exports.Prisma.ShoppingVendorScalarFieldEnum = {
+  id: 'id',
+  userId: 'userId',
+  vendorName: 'vendorName',
+  websiteUrl: 'websiteUrl',
+  loginUsername: 'loginUsername',
+  loginPassword: 'loginPassword'
+};
+
 exports.Prisma.PdfGroupScalarFieldEnum = {
   id: 'id',
   title: 'title',
@@ -619,6 +628,7 @@ exports.Prisma.ModelName = {
   ServiceLine: 'ServiceLine',
   ClaimFile: 'ClaimFile',
   InsuranceCredential: 'InsuranceCredential',
+  ShoppingVendor: 'ShoppingVendor',
   PdfGroup: 'PdfGroup',
   PdfFile: 'PdfFile',
   Payment: 'Payment',

packages/db/generated/prisma/package.json

@@ -1,5 +1,5 @@
 {
-  "name": "prisma-client-399048034458d5be2d4dc2eb570e77ca5c8345feb86d4b43b05fbd0cbc08be01",
+  "name": "prisma-client-763f714d62d731c0b365e1acdf19cac05ed4e6562d30b17cc8ffd11e6278eb14",
   "main": "index.js",
   "types": "index.d.ts",
   "browser": "default.js",

packages/db/generated/prisma/schema.prisma

@@ -30,6 +30,7 @@ model User {
   npiProviders         NpiProvider[]
   claims               Claim[]
   insuranceCredentials InsuranceCredential[]
+  shoppingVendors      ShoppingVendor[]
   updatedPayments      Payment[]             @relation("PaymentUpdatedBy")
   backups              DatabaseBackup[]
   backupDestinations   BackupDestination[]
@@ -299,6 +300,19 @@ model InsuranceCredential {
   @@index([userId])
 }
 
+model ShoppingVendor {
+  id            Int    @id @default(autoincrement())
+  userId        Int
+  vendorName    String
+  websiteUrl    String
+  loginUsername String
+  loginPassword String
+
+  user User @relation(fields: [userId], references: [id], onDelete: Cascade)
+
+  @@index([userId])
+}
+
 model PdfGroup {
   id        Int         @id @default(autoincrement())
   title     String